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The model output consists of two NetCDF files, each with five layers. The first dataset is the actual ET with the following filename format:
ET_C3S-glob-agric_GLS_CDS_EO_dek_20040820-20040831.nc
- ET_C3S-glob-agric_GLS_CDS_EO Product short name “ET” is actual
- dek_20040820-20040831 start and the end of the dekadal period of the
- .nc - Data format NetCDF.
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Table 1: Description of netCDF ET file attributes Anchor table1 table1
Layer number | Layer Name | Layer description | Scaling factor | Units |
1 | ET | actual evapotranspiration | 1 | mm/dekad |
2 | LAI QFLAG | Quality Assessment Report of the Collection 1km LAI. | NA | See GIOGL1_PUM_LAI1km- |
3 | FC QFLAG | Quality Assessment Report of the Collection 1km FCover. | NA | See GIOGL1_PUM_FCOVER1km- |
4 | ALB QFLAG | Quality Assessment Report of the Collection 1km Albedo. | NA | See CGLOPS1_PUM_SA1km- |
5 | LUT_ | actual number of pixels used in the resampling process from land use layer. | NA | dimensionless |
The second dataset is the potential ET with name format:
PET_C3S-glob-agric_GLS_CDS_EO_dek_20040830-20040831.nc (at 0.1 degree lat/lon grid)
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Table 2: Description of netCDF PET file attributes Anchor table2 table2
Layer number | Layer Name | layer description | Scaling factor | Units |
1 | PET | actual evapotranspiration | 1 | mm/dekad |
2 | LAI QFLAG | Quality Assessment Report of the Collection 1km LAI. | NA | See GIOGL1_PUM_LAI1km- |
3 | FC QFLAG | Quality Assessment Report of the Collection 1km FCover. | NA | See GIOGL1_PUM_FCOVER1km- |
4 | ALB QFLAG | Quality Assessment Report of the Collection 1km Albedo. | NA | See CGLOPS1_PUM_SA1km- |
5 | LUT_ | actual number of pixels used in the resampling process from land use layer. | NA | dimensionless |
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Table 3: EC tower names, location and land cover types reported by EC and the land cover used in the model. Anchor table3 table3
EC tower name | RMS 1 km | RMS3 km | RMS 10 km | EC land cover | Model land cover |
Twt | 1.59 | 1.16 | 1.67 | Crop land | Crop land |
Tw3 | 1.03 | 1.22 | 1.64 | Crop land | Crop land |
Tw1 | 1.41 | 1.18 | Wetland | Crop land | |
Tw4 | 2.76 | 1.04 | 1.19 | Wetland | Crop land |
Myb | 0.84 | 1.22 | - | Wetland | Grassland |
Wkg | 1.76 | 1.49 | 1.71 | Grassland | Shrub land |
VCM | - | 1.7 | 1.5 | ENF | ENF |
Pfa | - | 1.62 | 1.55 | Wetland | ENF |
OWC | - | 3.4 | 1.5 | Wetland | DBF |
NC1 | - | 1.47 | 3.67 | ENF | DES |
Ca2 | - | 1.48 | 3.91 | ENF | Shrubland |
Ca3 | - | 3.39 | 2.94 | ENF | MF |
CA-TP4 | - | 2.23 | 2.34 | ENF | DBF |
IB2 | 1.65 | 1.81 | 1.14 | Grassland | Grassland |
UMB | - | 2.15 | - | DBF | DBF |
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Figure 6: Root Mean square error (RMS) and correlations between MODGroETa model estimated ET and ground ET estimated using Twt EC tower with cropland land cover at three model resolution (1 ,3 and 10 km).The solid red lines represent that the ratio of ET estimates to ET measurements is 1.0 and the solid black lines are the regression of the ET estimates to measurements.
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